Distribution and phytosociological relations of two introduced plant species in an open sand grassland area in the Great Hungarian Plain
2002
Szigetvari, Cs.
Two introduced plant species, Cenchrus incertus and Ambrosia artemisiifolia were studied in a 0.5 km2 open sand area in the Kiskunsag National Park. The site is covered by valuable semi-natural grassland and is bordered by dirt roads. The aim of the study was to assess the extent and pattern of the area occupied by the two species and to describe the composition of the vegetation invaded with more or less success. Populations of the two species were mapped. In each stand of Cenchrus, in fifty-three 4 m2 quadrats aboveground plant cover, slope and exposition were documented. Both species concentrated on the roads. They -especially Ambrosia- were rare inside the intact part of the site, and were absent on abandoned roads.
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